多孔微结构光纤中飞秒激光脉冲超连续谱的产生  

Supercontinuum generation in holey microstructure fibers by femtosecond laser pulses

作　　者：李曙光[1] 冀玉领[1] 周桂耀[1] 侯蓝田[1] 王清月[2] 胡明列[2] 栗岩峰[2] 魏志义[3] 张军[3] 刘晓东[3] 

机构地区：[1]燕山大学红外光纤与传感研究所,秦皇岛066004 [2]天津大学精密仪器与光电子工程学院教育部光电信息技术科学重点实验室,天津300072 [3]中国科学院物理研究所光物理开放实验室,北京100080

出　　处：《物理学报》2004年第2期478-483,共6页Acta Physica Sinica

基　　金：国家高技术研究发展计划 (批准号 :863 -715 -0 0 1-0 2 12 );国家自然科学基金 (批准号 :10 2 2 740 1)资助的课题~~

摘　　要：报道了利用 80 0nm飞秒激光脉冲在多孔微结构光纤中产生超连续谱展宽的现象 ,连续谱展宽范围为 4 4 0—890nm .基于标量波近似理论对微结构光纤包层的有效折射率和基模的有效面积以及光纤的色散特性进行了计算 ,发现微结构光纤具有特殊的控制色散和波导特性的能力 ,对超连续谱展宽的机理进行了初步解释 .本文的理论分析和实验结果有较好的一致性 。It Is reported that the supercontinuum spectrum can be generated in holey microstructure fibers by femtosecond laser pulses with a 800nm center wavelength. Broadband continua extending from 440 to 890nm are generated in holey microstructure fibers. Based on the theory of scalar approximation, the effective refractive index of the cladding and effective area for the fundamental space-filling mode and chromatic dispersion of fibers are calculated. It is found that the holey microstructure fibers have specifically the ability of controlling dispersion and waveguide property.The mechanism of supercontinuum generation in holey microstructure fibers is explicated preliminarily. The theoretic analysis is in good accodance with the experimental result.It is considered that supercontinuum broadband spectrum can be generated in holey microstructure fibers even if their cladding constitutes of random gas-line.

关 键 词：多孔微结构光纤 飞秒激光脉冲 超连续谱 有效折射率 色散 连续谱展宽 有效折射率 光子晶体光纤 

分 类 号：O436[机械工程—光学工程]